Sorry, I forgot floor in polar_plot. But result is the same.
alpha=var('alpha')
polar_plot((1+cos(fibonacci(floor(tan((abs(alpha+pi/2)^0.22)))))), (alpha, -
pi/2, pi/2))
воскресенье, 8 июня 2014 г., 20:40:42 UTC+4 пользователь Андрей Ширшов
написал:
>
> Hi!
> I tried this example in SMC:
> http://cs613429.vk.me/v613429802/ce70/vEsYiuWxR4c.jpg
> When I just evaluate values all works fine:
>
> [1+cos(fibonacci(floor(tan((abs(alpha+pi/2)^0.22))))) for alpha in srange
> (-pi/2, pi/2, pi/50, include_endpoint= True)]
>
> But when I try to create polar_plot, I get an error message:
>
> alpha=var('alpha')
> polar_plot((1+cos(fibonacci(tan((abs(alpha+pi/2)^0.22))))), (alpha, -3*pi/
> 2, pi/2))
>
> Error in lines 2-2
> Traceback (most recent call last):
> File
> "/projects/7243d055-0edb-400d-978c-4845eb30b0c5/.sagemathcloud/sage_server.py",
> line 734, in execute
> exec compile(block+'\n', '', 'single') in namespace, locals
> File "", line 1, in <module>
> File "", line 2, in fibonacci
> File
> "/usr/local/sage/sage-6.2.rc0/local/lib/python2.7/site-packages/sage/combinat/combinat.py",
> line 502, in fibonacci
> n = ZZ(n)
> File "parent.pyx", line 1070, in sage.structure.parent.Parent.__call__
> (sage/structure/parent.c:8858)
> File "coerce_maps.pyx", line 223, in
> sage.structure.coerce_maps.NamedConvertMap._call_
> (sage/structure/coerce_maps.c:5442)
> File "expression.pyx", line 862, in
> sage.symbolic.expression.Expression._integer_
> (sage/symbolic/expression.cpp:6113)
> TypeError: unable to convert x (=floor(tan(abs(1/2*pi +
> alpha)^0.220000000000000))) to an integer
>
>
> What's wrong?
> Thanks in advance, Andrei.
>
>
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